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Published on Feb 25, 2013
Microtubules can either grow (green arrow head) or shrink (red arrow head) during the process. Each nucleus (blue sphere) is associated with a specific organelle called the Spindle Pole Body (SPB, yellow sphere). Kar3 motors (green dots) are anchored on the SPB, and by pulling on microtubules originating from the other SPB bring along the nuclei together. Credit: EMBL/F. Nédélec, R. Gibeaux, and A. Politi